Node takes effect after using NVM to install under Windows system, but NPM does not take effect

problem ：

Use nvm install nodeJS after ,node -v The command can be used normally , But use is related npm The command of will prompt as shown in the figure ：

analysis ：

First, make sure your nvm There's no problem with execution , such as ,
see nvm In your installation node edition , command ：nvm list

Use node Version of , Through the command ：nvm use Version number , Here we use 10.20.1 demonstration ：

And then look at it node Version of , Through the command ：node -v

If a prompt like this appears ：
node : Cannot be “node” Item identified as cmdlet、 function 、 The name of the script file or runnable program . Please check the spelling of the name , If the path is included , Please make sure the path is correct , then try again
.
The position of That's ok :1 character : 1

• node -v

•   + CategoryInfo          : ObjectNotFound: (npm:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
  

Please read this friend's article about installation instructions （ I stepped on this pit , I have a wipe ）：
https://blog.csdn.net/taylorzun/article/details/105471841
Here's the thing , I didn't delete the link above C:\Program Files\nodejs file , There is actually this file under my computer .
**

solve ：

**
There's a lot of nonsense on it , It's nothing more than avoiding some people from appearing in the pit like me , Okay , Then the main play comes .
step ：
nvm list available Check out the versions you can install ：

Then I'll find a random version here to demonstrate , I choose 10.20.0 Well
perform ：nvm install 10.20.0

We can see that the prompt has been installed npm v6.14.4 The success of , But let's go to the catalogue （ install nvm The catalog of ） Check it out. ：

It's not about npm The file of , The reason is simple , Just as you have searched many blogs ,8.11 Previous versions of node The version corresponds to npm Can't install it automatically ,
Pay attention to our installation 10.20.0 The prompt is shown in the figure below

Then go to this link ：https://npm.taobao.org/mirrors/npm/
Download you Install that node The version of the version prompted during the version npm that will do （ To be honest, after reading so many blogs, I'm still confused , That's the problem , It says to download the corresponding... In this link npm Version can , But what is the corresponding version ？）
that npm v6.14.4 yes ：

After unpacking, rename the folder to npm And copy it to node_modules Under the table of contents

The final will be npm in bin In the catalog npm、npm.cmd、npx、npx.cmd Copy to and node_modules Directory under the same level directory

Use nvm use 10.20.0 Use node Of 10.20.0 edition （ It is best to use node -v Check out the currently used node Version of ）：

The last step , verification npm, Command ：npm -v

With version instructions, you can use npm 了 , But I executed an order :cnpm -v Find out ,

Don't panic , We just didn't install Taobao image , So at this time , perform ：
npm install -g cnpm --registry=https://registry.npm.taobao.org
Can be installed

Okay , The pit is finished , Everybody go to bed early , Stay up late and hurt yourself 、 Injury 、 Kidney injury